PL720 4WD L4-2389cc 2.4L SOHC (Z24) (1983)
Fast Idle Control Device (F.I.C.D.): Description and Operation
The idle-up or Fast Idle Control Device (FICD) system is used on models equipped with A/C. The system increases idle speed when the A/C system is
operating in order to prevent poor battery charging, erratic idling and reduced A/C cooling capability.